@article{PFMT_2018_3_a13,
     author = {S. F. Kamornikov and O. L. Shemetkova},
     title = {On complements of residual in extensions of finite groups},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {80--83},
     publisher = {mathdoc},
     number = {3},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2018_3_a13/}
}